Chevrolet Performance offers both internally and externally balanced flywheels and flexplates. It is critical that you use the correct design for your specific engine application. Engines with one-piece crankshaft seals require externally balanced flywheels or flexplates (except for ZZ427, ZZ572/620, ZZ572/720R and the Anniversary Edition 427). Check the accompanying charts to find the correct parts for specific engine applications.

Part Number: 14085720
Year of Engine: 1965-present
Outside Diameter: 12.750"
Crank Flange Bolt Pattern: 3.580"
Clutch Diameter: 10.4"
Starter Ring Gear Teeth: 153
Technical Notes: Lightweight nodular iron; weighs approximately 15 lbs; for internally balanced engines